Re: [Libusb-devel] problems with usb calls via usermode (ezusb)

[Alexander 'E-R. K. <ad...@er...>]

Hi all,
looks like it's not a libusb problem.

I took the hexpad example from cypress (simple usb-usermode access).
First of all i had to claim the interface cos i got 
"Jul 22 13:33:36 C1VE kernel: usb 1-1: usbfs: process 8584 (bulk_out) did not 
claim interface 0 before use"
in syslog.
The first thing is, that the fitting ioctrl- call returns a -1, but errno says 
"Success" -thats why i used that stupid ==.

I also added some strerror and printf calls.
http://www.erazor-zone.de/ez/projects/linux/ezusb/bulk_out.c
As you can see it only consits of ioctl calls, but i got that "Invalid 
argument" again.

C1VE hexpad # getdevpath -v 0547 -p 2131 | ./bulk_out -c00
bulk xfer error Invalid argument

Well, i can't image where that error i coming from... 
I'm sure i only used the kernel headers and since they are from 2.6.7 and i'm 
using a 2.6.7 kernel everything should be ok.

I'm quite confused :-(

cheers -Alex